noun

1. 1. the more or less circular figure formed by a line, thread, wire, etc. that curves back to cross itself
   2. a noose
2. anything having or forming this figure the loop of a written l
3. a sharp bend, as in a mountain road, which almost comes back upon itself
4. a ring-shaped fastening or ornament loops for a belt
5. a plastic intrauterine contraceptive device: usually with the
6. a segment of film or magnetic tape joined end to end to form a continuous strip for endless repetition in mixing or dubbing sound
7. a system consisting of a series of operations or activities in which each depends on the outcome of the previous one; esp., such a system in which the result of a later operation affects an earlier operation, providing continuous feedback
8. Aeron. a looplike airplane maneuver flown in a vertical plane
9. Comput. a sequence of program instructions that are repeatedly executed until certain conditions are reached
10. Elec. a complete circuit
11. Physics the part of a vibrating string, air column, etc. between the nodes; antinode

Etymology: ME loup < Anglo-N forms corresponding to ON hlaup, a leap, hlaupa, to run (akin to leap) > Dan løbe(knude), lit., running (knot)

transitive verb

1. to make a loop or loops in or of
2. to wrap around one or more times loop the wire around the post
3. to fasten with a loop or loops to loop curtains back
4. to dub in or rerecord dialogue or other sound into (a film)
5. Elec. to join (conductors) so as to complete a circuit

intransitive verb

1. to form into a loop or loops
2. to progress as a measuring worm does by alternately straightening the body and drawing it up into a loop
3. Aeron. to perform a loop or loops

noun

Etymology: ME loupe, prob. < MDu lupen, to peer